Electric locomotive engine



(No Model.) 2 Sheets-Sheet 1.-

L. DAPT.

ELECTRIC} LOGOMOTIVE ENGINE.

No. 325, 15, Patented Sept. '8, 1885'.

7 UNITED STATES PATENT OFFICE.

L EO DAFI, OF GREENVILLE, NEW JERSEY.

ELECTRIC LOCOMOTlVE-ENGINE.

SPECIFICATION forming part of Letters, Patent No. 325,915, datedSeptember 8, 1885.

Application filed Jannai-y 11, 1883. (No model.)

amount of power which'could be directly 9X,

erted in the revolution of the armature of a motor it was necessary toconnect that ar mature with some reduci ngcontrivance, where by thegreater motion and less force of the armature was converted into lessmotion and greater force on the drivingwheel. This intermediatecontrivance necessarily involves great loss of power in friction, and itis also attended with reduced velocity of the driving wheel.

My invention relates to a device for obviating these difficulties byconnecting the revolving armature directly to the shaft of thedriving-wheel, and it will be readily understood from the accompanyingdrawings, in which--- 7 Figure 1 represents avertical view through thelinear a: of Fig. 2, and Fig. 2 a plan View of my apparatus through theline 11y of Fig. 1. Fig. 3 represents a view, partly in elevation,showing the connections of the armatures, field-magnets, and reversingcontrivance; Fig. 4, a plan view of the same.

A A represent the fieldmagnets, B the armatures, and O the commutators.As shown in this application, one field-magnetAis used M to make fieldsfor two armatures-one at either end. P

There are many ways of electrically connecting the armatures andfield-magnets; but I prefer an arrangement by which the relation betweenthe armatures and the fieldmagnet may be altered, thereby changing thedirection of rotation of the armatures. One

form of switch suitable for accomplishing this result is shown in anapplication which I have made for Letters Patent on the 12th day ofAugust, 1882, Serial No. 69,179, to which I refer for a fuller drawingof the switch. This switch is shown generally at T. The electric ty fromthe rail or other conductor speed may be varied. use two or morearmatures, as shown at B B, In

ate both armatures.

second armature may be broken and closed enters this switch by the wiremarked 1 from the insulated wheel K or from some other suitable part;thence it passes by wire 2 to the commutator-brushes on the armatures;thenceby wire 3 again to the switch, thereby enabling the reversal ofthe commutator-circuits with reference to the fieldmagnet; thence bywire 4 to the field-magnet, and from the field-magnet to thereturnconductor. the rheostat in the manner shown in my otherapplication, by means of which the In certain cases I may Fig. 4, inplace-of a single armature. this case one commutator will serve to oper-The circuit going to the by an independent switch, if desired. Incertain cases, however, this alteration is not essential, and othermethods may be employedas, for instance, the shifting of thecommutator-brushes upon the commutator. In other cases independentfield-magnets may be employed for each armature, and this arrangement Iintend to make the subject of an independent application. It will beunderstood that the field-magnets are suitably suppdrted on the truck.As shown, they are carried by brackets.

.When desired, I may add additional field magnets on the other side ofthe armatures from the sides at which the field-magnet A terminates.These additional field-magnets will of course be suitably supported. Imay also employ several armatures upon the same shaft for increasedpower, if I so desire.

\Vhat I claim as my invention, and desire to secure by Letters Patent,is

The combination, with the track connected to the source of electricity,of a field-magnet, two armatures driven thereby,driving-wheelssupporting the engine, directly connected with the armatures, andadapted to receive the current from the track and circuit-connections,

substantiallyas described, wherebythe current from the track passesthrough the wheels and to and through the armature and fieldinagnetcoils, substantially as described.

LEO DAFT. Witnesses: p

GEo. H. EVANS, ANTHONY GREF, J r.

The wires 5 and 6 connect with.

